Spring structure



Dec. 16,1930. J M,OLDHAM v 1,785,359

SPRING STRUCTURE Fil'ed Feb. 13, 1930 INVENTOR c/a/m ULOId/wn'w ATTORN vs Patented Dec. 16, 1930 UNITED STATES PATENT OFFICE JOHN M..OLDHAM, OF DETROIT, MICHIGAN ASSIGNOR TO L. A. YOUNG SPRING & WIRE CORPORATION, OF DETROIT, MICHIGAN SPRING STRUCTURE Application filed February 13, 1930. Serial No. 428,041.

The main object of this invention is to provide in a spring structure an improved .supporting base which effectively supports the springs and is also well adapted for the attachment of the upholstery thereto.

A further object is to provide a structure having these advantages which may be formed of comparatively light material and at the same time is very strong and rigid.

A still further object is to provide a structure having these advantages which is economical to produce and permits the very rapid assembly of the springs and securing of the upholstery.

()bjects pertaining to details and economies of my invention will definitely appear from the description to follow. The invention is defined in the claims. I

A spring structure embodying the features of my invention is clearly illustrated in the accompanying drawing in which:

Fig. 1 is a fragmentary perspective bottom view of a spring structure embodying the features of my invention.

r Fig. 2 is a detail vertical section through a spring structure embodying my invention.

Fig. 3 is an enlarged detail sectional view on line 3-3 of Fig. 1.

Referring to the drawing, 1 represents the body springs, only outer body springs being illustrated. The springs are supported by a base frame designated generally by the numeral 2 which is formed of sheet metal folded to provide a channel having inturned flanges 3 and 4 at the top. The flange 4 has an outwardly offset portion 5 overlapping and spaced from the flange 3.

The tacking strip 6, preferably of. fiber, is arranged within the channel of the frame with the flanges 3 and 4 clamped thereon.

The bottom coils 7 of the body springs are arranged between the flanges which coact to form an inwardly facing channel 8 and are secured therein by indenting 'or clamping down the outer flange thereon as at 9, Fig. 3. This provides a very secure means for attaching the springs to the frame and means which permits rapid assembly of the springs in the frame.

Thebottom wall of the frame is provided I which is wrapped upon the frame and se-- cured thereto by tacks driven into the tack ing strip. A gimp preferably provided. 7

The upholstery is thus secured to the under side of the frame so that the securing means is concealed when the cushion is in use.

The holes 10 are formed in the frame prior to the bending .thereof and, owing to their presence, the frame may be easily bent. While the holes are distorted in the bent portion of the frame as shown in Fig. 1, this does not interfere with their utility.

The parts of my improved spring structure are economical to produce, and are very rapidly assembled, both in the matter of securing the springs and in the attachment of the upholstery.

I have illustrated only portions of a spring, structure and but one embodiment of my improvements as it is believed that this disclosure will enable those skilled in the art to embody or adapt the same as may be desired.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

l. The combination in a spring structure of the class described with the body springs,

or finishing strip 14 is of a base frame of sheet metal folded into a therein, and an upholstery covering comprising a skirt portion wrapped uponsaid frame and secured to the under side thereof by tacks driven into the tacking strip through said openings in said frame.

2. The combination in a spring structure with the body springs, of a channeled base frame having inturned overlapping flanges I at the top, the overlapping portion of the outer flange being spaced from the inner flange providing an inwardly facing spring 5 supporting channel in which the bottom coils of the body springs are clamped, a tacking strip within the channel of said frame, said flanges being clamped upon said tacking strip, one wall of the frame havin a plurality of tacking openings therein, an an upholstery covering tacked 'to said tacking strip through said openings.

3. The combination in a spring structure, of body springs, a channeled base frame having overlapping flanges clamped upon coils of said springs, and a tacking strip arranged within the frame, one wall of the frame having openings therein through which tacks may be driven into said tacking strip for securing an upholstery covering thereto.

4. A spring structure frame element of channel cross section having inturned overlapping flanges at the top, the outer flange being offset from the inner providing an inwardly facing spring supporting channel, and a tacking strip within said channel, the bottom wall having a series of openings therein through which upholstery tacks may be driven to secure upholstery to said frame.

5. A spring structure, a base frame of sheet metal folded into-a channel and having inturned overlapping flanges at the top, the overlapping portion of the outer flange being u wardly offset and spaced from the inner ange' providing an inwardly facing channel in which body sprin s may be secured by clamping the outer ange thereon, and a .tacking strip clamped within said frame, the bottom wall of the frame having a 40 plurality of openings therein through-which upholstery securing tacks may be driven.

6: A spring structure frame element of channeled cross section having inturned overlapping flanges, the overlapping portion of the outer flange being spaced from the inner flange providing a spring engaging channel, and a tacking strip within the channel of said frame, said flanges being clamped upon said tacking strip, one wall of the frame having a plurality of tacking openings therein.

7. A channeled spring structure frame element having spaced overlapping flanges providing-body spring securing means, and a tacking strip arranged within the frame channel, one wall of the frame having openin s therein. through which tacks may be driven into the" tacking strip for securing the upholstery covering thereon.

In witness whereof I have hereunto set my 0 hand.

JOHN M. OLDHAM. 

